Undertone

Like a dwarf song sweetly filling the Mines of Moria (Lord of the Rings nerds are with me), or a subterranean version of "Here Comes Treble" (The Office fans feel me), today, history will be made at the Cave of the Winds (100 Cave of the Winds Road, tiny.cc/xohr8w). Yes, Notre Dame's a cappella group The Undertones (hey — that's a pun in itself!) will bounce awe-inspiring boy voices all over our famous rock caverns in a show of natural acoustical splendor as a fundraiser for Colorado fire and flood relief. Don't miss echo-y performances at noon, 1:30 ($20/adults, $15/kids, including discovery tour and Canopy Hall concert) and 3:30 ($25/$17, including lantern tour and Grand Caverns concert by lamplight). — Matthew Schniper